Filling-machine governor



March 18, 1930. B; s. HARRINGTON FILLING MACHINE GOVERNOR Filed July 5, 1927 17 must move'upwardly before a unit can be 'rom Operating, but when the pressure in the supplyiline 15 builds up sutflciently, it causes the pisten 12 to be 'liftedin the borell until a reduced portion 22 of the rod 17 in the bore i 19 is moved into a position' in register with the passageway 20 in the casing, whereuponthe air line 21 is opened up and the machine is permitted to discharge a unit of the substance. From this it will be understood that the rod discharged. Between discharges, the rod movesdownwardly again.

The pressure onjthe substance within the supply line 15 acts against the pressure on the air contained both within the hollowpiston 12 and the chamberlS, and the particular any well known Construction, 'the device 23' substance in the supplyline is prevented from working up into the piston andthe air cham- I ,Conduit 24.

i chamber 18.

pressure at which the govern'or will open up the air lne 21 s determncd by the setting of an adgustable pressure relef device 23 of being connected withthe chamber 18 by a The air in the piston`^12 and chamber 18 is prevented from working down into' the substanoe in the supply line by the provision of a flanged packing 25 in the bore 11, and the her by means of another flanged packing 26 in the bore. Betweensuch packings the bore' 11 V is preferably vented; Similar packings 27 and 28 are located n'the bore 19' above the Inasmuch 'as 'the substance'handled by a measuring and dispensing machine 'of the volumetric type is supplied to the machine in a substantially constant flow, it is desirable,

in case the operation of the machine is discontinued 'for any' reason, that the flow of substance be returned to the source again, so as not to build up an excessive pressure in the supply line, and interfere with the operai i tion of the mechanism pumping the substance from the source to the machine; To provide for such a condition, the bore 11 in the casing of the governor is providedwith 'an annular passageway 29-which communicates v With a pipe 30 leading back to the source of supply. Should the pressure on the substance exceed a certain amount, as when the machine discontinues operation, the piston 12 will be raised in the bore 11 until the passageway 29 is eXposed beneath the piston whereupon the substance may flow directly' from the passageway 1 1 into the return pipe 30. The pase sageway 29 `is located well above the point which the bottom of the pisten 12 reaches when the reduced portion '22 of the rod 17 comes into register with the passageway 20,

so thatthe piston 12 will never'move upwardly far enough to place the passageway 29 in communication with passageway` 14 as and controlled bythe 'pressure on the substance therein for i automatically preventing the substance' in 'the cylinder from leaving the same until after' the pressure on the substance has reached a predetermined amount.

2'. In a'measuring and dispensing machine of the volumetric type, a measuring cylinder, means for conducting to the cylinder the substance to be measured, means associated with said substance-conducting means and con trolled by the pressure on the substance there in for automatically preventing the substance in the cylinder from leaving the sameuntil after the pressure on the substance has reached apredetermined amount, and means for varying the pressure' at which the substance will be permitted to leave thecylinder.

3. In a measuring and dispensing'machine of the volumetric type, 'a supply line, an air linehaving a valve therein which must' be open in order to permit operation of the machine, and means in the supply line `for holding the valve in the air line closed. until the;

pressure on the substance inthe supplyline has reached a predetermined amount.`

4. In a measuring and dispensing machine of the volumetric type, a supply line, an air line having a valve therein which must be open in order to permit operation of the machine, means in the supply line for holding the valve in the air line closed until the pressure on the substancein the supply line has reached a predetermined amount, and means for varying the pressure at which the air line will be opened. i r s 5. In a measuring and dispensing machine i of the volumetric type, a governor consistng of a casing having twotransverse passageways therein, one for the substance under pressure being dispensed from the machine and the other for a fluid under pressure used to operate the machine, means for closing'ofl' the passageway for the Operating fluid, and.

means for rendering said closing means inr effective when the pressure in the passageway for'the substance reaches a predetermined amount. i

6. In a measuring and dispensing machine of the volumetric type, a governor consisting of a casing having two transversepassa'geways therein, one for' the substance under pressure being dispensed from the machine and the other fora fluid underpres'sure used to operate the machine, a piston in the c'asing'` between said passageways, and arod. on'the piston closing ofi the passageway for the operating fluid and having a reduced portion which is movable by the piston into register With said passageway When the pressure in the passageway reaches a predetermined amount.

7. In a measuring and dispensing machine ot' the volumetric type, a measuring cylnder, means for conducting to the cylinder the substance to be measurecl, means for causing measured quantities of the substance to be dispensed from thecylinder, and means associated With said substance-conducting means and controlled by the pressure on the substance therein for automatically preventing operation of said last mentioned means until after the pressure on the substance in the cylinder has reachecl a predetermined amount.

8. In a measuring and dispensing machine of the volumetric type, a measuring cylinder, means for conducting to the cylinder from a suitable source a substantially continuous supply of the substance to be neasured, means 'for causing measured quantities of the substance to be dispensed from the cylinder,

means associated With said suhstanceconducting means and controlled by the pressure on the substance therein for automatically preventing operation of said last mentioned means until after the pressure on the suhstance in the cylinder has reached a predstermined amount, and means for automatically preventing the pressure on the substance in the cylnder from materially exceecling such predetermined amount.

In testimony Whereof I have hereunto signed my name.

BERTIE sHARRiNGToN. 

